Power-hammer.



W. G. SHULTS.

POWER HAMMER. APPLICATION FILED FEB-17,1915- 1,145,168. Patented July 6, 1915.

2 SHEETS-SHEET I.

{DLUMBIA PLAHOOIAPH CO-IWAIHIW, B. C.

W. G. SHULTS.

POWER HAMMER.

APPLICATION FILED FEB. 17. 1915.

Patented July 6, 1915,

2 SHEETS-SHEET 2.

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WILLIAM SHULTS, OF OAKDALE, TENNESSEE.

POWER-HAMMER.

Application filed February 17, 1915.

To all whom it may concern Be it known that I, VVILLIAM G. SHULTS, a citizen of the United States of America, residing at Oakdale, in the county of Morgan and State of Tennessee, have invented certain new and useful Improvements in Power-Hammers, of which the following is a specification.

The present invention relates to improvements in power hammers, and is designed to provide a hammer which is simple in construction, durable, facile, and easily operated.

The primary object of the invention is the provision of a portable power hammer which is compact in construction and well adapted for use in'connection with industrial enterprises such as railway construction where a power hammer of this type is desirable and necessary.

The invention consists in certain novel combinations and arrangements of parts whereby the hammer is operated and controlled as will be more fully hereinafter pointed out and claimed.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles of the invention.

Figure 1 is an elevation of the power hammer complete. Fig. 2 is an enlarged detail cross sectional view on line 2 2 of Fig. 1. Fig. 3 is a detail view in perspective of a strap for supporting the operating lever. Fig. 4 is a sectional view showing the operating valve and piston, with the hammer down. Fig. 5 is a similar view, with the hammer raised. Fig. 6 is a detail view showing dies keyed to hammer and stand.

In the preferred embodiment of my invention as illustrated in the drawings, I shall hereinafter refer to steam as the motive fluid, but it will of course be understood that other motive fluid pressure such as air may be utilized as the power for operating the hammer.

The entire device is supported upon a suitable base as 1, which rests upon the ground or other support, and'from this base rises the frame 2, which is composed of a pair of uprights joined by the cross arm 3, and secured to the base 1, by bolts 4 passed through flanges on the uprights of the frame. The stand 5 is also supported upon Specification of Letters Patent.

Patented Jul 6, 1915.

Serial No. 8,738.

the base 1, and is provided with a die 6 fixed by key 6 directly under the die 7, which is attached to the cross head 8 and fixed by key 7, the latter two members 7 and 8 forming the hammer or head of the device. The hammer is designed to reciprocate vertically, and to facilitate its operatlon, it is provided with side grooves 9 which slide over the vertical guide bars 10, which are arranged parallel to the hammer rod 11. These two guide bars 10 are adjustably held to the U-shaped yoke 12 by means of bolts 13 and lock nuts 14, four bolts being illustrated, two at the upper end of the guide bars, and two at the lower end, as will be understood. The U-shaped yoke 12 is rigidly fixed to the frame 2 by means of the straps 15 and-bolts 16, and the upper end 17 of the voke is fixed rigid with the cross arm 3 of the frame by bolts 12. A stuffing box 11 is screwed up into the end 17 of the yoke and makes a steam tight packed joint for the piston. By means of the nuts and bolts 13, it will be readily seen that the guide bars 10 may be adjusted to proper position so that the hammer or cross head 8 will move properly and slide easily over these guide bars. A pair of spring pressed heads 18 at the top of the U-shaped yoke form cushions for the hammer head, and absorb the shock at the upper end of the movement of the hammer.

The stem 11 of the hammer has at its upper end a piston 19 which is vertically reciprocable in the cylinder 20,'-which is located directly above the frame and is supported thereby. This cylinder is supplied with steam through the two pipes 21 and 22, which are connected to the auxiliary cylinder 23, and are each provided with a union joint 24. An outlet or exhaust pipe 25 is attached at the upper end of this auxiliary cylinder, and a steam inlet pipe 26 is connected to the cylinder as indicated. A bypass or exhaust pipe 27 is connected to the cylinder 23 near its lower end and also near its upper end, and is equipped with a union joint 28. Within the auxiliary cylinder 23 a piston valve is adapted to reciprocate, and this valve is provided with three heads, as 29, 30, and 31, the heads being connected by the valve stems 32 and 33. Between the heads 29 and 30, a steam chest 34 is formed, and between the heads 30 and 31, an exhaust chamber 35 is formed. This piston valve is operated either manually or by foot power, as plainly illustrated in Fig. 1. For manual operation, the operating lever 36 is utilized, and this lever is pivoted on the pintle 37 of the strap 38 attached to the hammer frame, and the operating lever 36 is connected to the valve stem by means of the connecting rod 39 which is pivoted at 4:0 to the stem. It will be understood, of course, that the pins or pintle 37 is the fulcrum for the operating lever 36, and by this means the piston valve may be raised or lowered manually. For operation by foot power, a treadle 41 is utilized, and this is held in lifted position by means of a spring 4-2 which is attached to a slide block a3 on the treadle 41. The treadle 41 is connected with the operating lever 36 by means of the pivoted connecting link 44-, and the operation will be readily understood. A controlling or regulating lever 4E5 is shown in connection with the valve is in the steam inlet pipe 26, and it will readily bev understood that the pressure of steam from the suitable source of supply to the auxiliary cylinder may be regulated by this lever and valve- The moclus operomclz' is as follows: Assuming the hammer to be down, and the parts as indicatedin Figs. 1 and a, the operating lever is pushed down, and this action will lift the piston valve to the position indicated in Fig. 5. The steam from the inlet pipe 26 now passes through the steam chest 34: and by way of the pipe 21 passes into the upper end of the cylinder 20 above the piston19, and the pressure of the steam on top of the piston forces the piston, its stem, and the hammer down for an operative stroke of the hammer.

In Fig. 5 it will be seen that the exhaust steam may pass out from beneath the piston through the pipe 22, exhaust steam chest 35, and by way of the by-pass 27 to the upper end of the cylinder 23 and thence through the outlet pipe 25. To lift the hammer, the lever 36 is shifted, and this action moves the piston valve to the position in Fig. 4:. The live steam now passes through the inlet pipe 26, steam chest 3%, and pipe 22, to the lower end of the cylinder Copies of this patent may be obtained for The strap 38 is provided with an additional bolt end 37 on which the operating lever 36 may be fulcrumed if desired, and in-some cases this arrangement is necessary for the convenience of the hammer operator.

From the above description taken inv con-' nection with my drawings, it is apparent that I have provided a device which fulfils the purpose and objects of -tony invention, and which will perform its functions in a comparatively perfect manner.

. What I claim'is: I

1. The combination in a power hammer with a main cylinder and an operating piston therein, of an auxiliary cylinder and pipes connecting said cylinders, of a piston valve in the auxiliary cylinder having three heads forming a steam chest with a steam inlet pipe connected thereto and an exhaust chamber with an exhaust pipe connected thereto, and said piston valve adaptedto connect its steam chest with either of the pipes between the two cylinders.

2.'The combination in a power hammer with a main-cylinder and its reciprocable operating piston therein, of an auxiliary cylinder connected to said main cylinder by a pair of pipes, a piston valve in the auxiliary cylinder comprising three heads forming a steam chest and an exhaust chamber in the auxiliary cylinder, a steam inlet pipe to the steam chest, and a by-pass pipe leading from the exhaust chamber to another portion of the auxiliary cylinder, and means for operating said piston valve.

In testimony whereof I aifix my signature in presence of two witnesses.

WILLIAM G. SHULTS.

Witnesses:

RoY E. Snows, FREDERICK A. EICHORN.

five cents each, by addressing the Commissioner of Patents,

Washington, 13.0. 

